TY  - BOOK
AU  - Troeh,F.R
TI  - Soil and Soil fertility 
SN  - 9780813809557
AV  - S591.T7 2005 
PY  - 2005///
CY  - Lowa
PB  - Blackwell publishing 
KW  - Soil science
KW  - Soil fertility
ER  -